Finned Tube Heat Exchanger for Power Plant

Finned Tube Heat Exchanger for Power Plant

Structure and principle

Structure: Finned tube heat exchanger is mainly composed of finned tube, shell, tube plate and other components. Finned tube is its core component, usually made of steel or copper tube, etc., with fins welded or rolled on the outer surface of the tube to increase the heat transfer area.

Principle: The use of fins increases the heat transfer area and improves the heat transfer efficiency. The hot fluid flows inside the tube and the cold fluid flushes the finned tube horizontally outside the tube, exchanging heat through the tube wall and the fins to realize the cooling of the hot fluid or the heating of the cold fluid.

Application in power plant

Flue gas waste heat recovery: The flue gas discharged from the boiler of the power plant contains a large amount of waste heat, and through the finned tube heat exchanger, the heat in the flue gas can be transferred to other media, such as air, water, etc. The heated air can be returned to the boiler. The heated air can be sent back to the boiler burner to improve the combustion efficiency; the heated water can be used to preheat the boiler make-up water or other process water to reduce energy consumption and improve the thermal efficiency of the power plant.

Turbine condensate heating: steam discharged from the turbine condenses into water in the condenser, and the finned tube heat exchanger can be used to heat the condensate with the steam extracted from the turbine or other heat sources to increase the temperature of the condensate, reduce the energy consumption of the heat return system, and improve the economy of the power plant.

Circulating water cooling: The circulating water system of the power plant needs to cool the high temperature circulating water, finned tube heat exchanger can be used as a cooling device to transfer the heat of the circulating water to the air or other cooling media, so that the circulating water can be cooled down and then returned to the system for recycling.

Advantages

Efficient heat transfer: the presence of fins greatly increases the heat transfer area, so that the heat exchanger can realize efficient heat transfer in a small space, improve the heat transfer efficiency and reduce equipment costs.

Compact structure: due to high heat transfer efficiency, under the same heat transfer power, finned tube heat exchanger is relatively small in size, covers a small area, and is easy to install and arrange in the limited space of the power plant.

Strong adaptability: according to different working conditions and media requirements, the finned tube of different materials and structural forms can be selected to adapt to a variety of temperatures, pressures and corrosive media environment.